Picture frame



FIG. 1 is a top perspective view of a picture frame showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is an enlarged bottom perspective view of a corner thereof;

FIG. 5 is another top perspective view thereof;

FIG. 6 is another top perspective view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a top exploded view thereof; and,

FIG. 9 is a bottom exploded view thereof. 

CLAIM The ornamental design for a picture frame, as shown and described. 